Form Disposal Question

Posted on 2003-11-14
Medium Priority
Last Modified: 2010-04-16
I have a question about how and when an instance of System.Windows.Form get's disposed.  Here is the scenario:

I created a form, showd it and then put a reference to said form in a hashtable.  I then closed the form.  When I later attempted to access the object through the hashtable I got an exception saying it had been disposed.  Shouldn't the reference in the hashtable be sufficient to keep this form from being disposed?  If not is there anyway to prevent the form from being disposed on closure?  Finally if I can't prevent the disposal on closure is there any way to determin if a reference refers to an object which has been previously disposed?
Question by:derekl
  • 2
LVL 10

Expert Comment

ID: 9749220
What you can do is 'hide' the form rather than close it, this will prevent it from being disposed of.


Author Comment

ID: 9749532
Which event do I need to override to provide this behavior?
LVL 10

Accepted Solution

smegghead earned 375 total points
ID: 9749623

rather than


Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

In order to hide the "ugly" records selectors (triangles) in the rowheaders, here are some suggestions. Microsoft doesn't have a direct method/property to do it. You can only hide the rowheader column. First solution, the easy way The first sol…
This article describes a simple method to resize a control at runtime.  It includes ready-to-use source code and a complete sample demonstration application.  We'll also talk about C# Extension Methods. Introduction In one of my applications…
The video provides a quick and easy steps to migrate MBOX file to well known Outlook PST and Office 365. Besides this, it also supports and migrates more than 20 email clients of MBOX which include AppleMail, Opera, Thunderbird and SeaMonkey effortl…
If you are looking for an automated tool which can generate reports for Outlook emails and other items from PST file, then you can go for Kernel PST Reporter tool. The reports which are created by this tool are helpful to analyze and understand PST …

624 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question